Structure-Based Design and Synthesis of Novel Potent Na<sup>+</sup>,K<sup>+</sup>-ATPase Inhibitors Derived from a 5α,14α-Androstane Scaffold as Positive Inotropic Compounds
作者:Sergio De Munari、Alberto Cerri、Mauro Gobbini、Nicoletta Almirante、Leonardo Banfi、Giulio Carzana、Patrizia Ferrari、Giuseppe Marazzi、Rosella Micheletti、Antonio Schiavone、Simona Sputore、Marco Torri、Maria Pia Zappavigna、Piero Melloni
DOI:10.1021/jm030830y
日期:2003.8.1
The design, synthesis, and biological properties of novelinhibitors of the Na(+),K(+)-ATPase as potential positive inotropic compounds are reported. Following our model of superposition between cassaine and digitoxigenin, digitalis-like activity has been elicited from a non-digitalis steroidal structure by suitable modifications of the 5alpha,14alpha-androstane skeleton. The strong hydrophobic interaction
New 17-\x9b3-imino-2-alkyl propenyl!-14.beta.-hydroxy-5.beta.-androstane derivatives active on the cardiovascular system by inhibiting Na+,K+-ATPase, a process for their preparation, and to pharmaceutical compositions for the treatment of cardiovascular disorders, such as heart failure and hypertension.
Structural basis of binding and inhibition of ornithine decarboxylase by 1-amino-oxy-3-aminopropane
作者:X. Edward Zhou、Kelly Suino-Powell、Chad R. Schultz、Bilal Aleiwi、Joseph S. Brunzelle、Jared Lamp、Irving E. Vega、Edmund Ellsworth、André S. Bachmann、Karsten Melcher
DOI:10.1042/bcj20210647
日期:2021.12.10
and its cofactor pyridoxal 5-phosphate (PLP) and functions by competing with the ODC substrate ornithine for binding to the catalytic site. We have revisited the mechanism of APA binding and ODC inhibition through a new crystalstructure of APA-bound ODC, which we solved at 2.49 Åresolution. The structure unambiguously shows the presence of a covalent oxime between APA and PLP in the catalytic site
鸟氨酸脱羧酶 (ODC) 是多胺 (PA) 合成的限速酶。PA 是增殖所需的癌代谢物,药物 ODC 抑制用于治疗过度增殖性疾病,包括癌症和传染病。最有效的 ODC 抑制剂是 1-氨基-氧基-3-氨基丙烷 (APA)。ODC-APA 复合物的先前晶体结构表明 APA 非共价结合 ODC 及其辅因子 5-磷酸吡哆醛 (PLP),并通过与 ODC 底物鸟氨酸竞争结合催化位点发挥作用。我们通过 APA 结合的 ODC 的新晶体结构重新审视了 APA 结合和 ODC 抑制的机制,我们以 2.49 Å 的分辨率解决了这一问题。该结构清楚地表明在催化位点 APA 和 PLP 之间存在共价肟,我们通过质谱在溶液中证实了这一点。稳定的肟与 ODC 发生广泛的相互作用,但不能被分解代谢,这解释了 APA 在 ODC 抑制中的高效力。此外,我们解决了在底物结合袋处结合柠檬酸盐的 ODC/PLP 复合结构。这两种结构为开发更有效的药物
17α-<i>O</i>-(Aminoalkyl)oxime Derivatives of 3β,14β-Dihydroxy-5β-androstane and 3β-Hydroxy-14-oxoseco-D-5β-androstane as Inhibitors of Na<sup>+</sup>,K<sup>+</sup>-ATPase at the Digitalis Receptor
receptor was used to design these compounds. On that basis, the possibility to designnovel potent inhibitors of Na(+),K(+)-ATPase without being constrained by the stereochemistry of the classical digitalis skeleton in the D-ring region was predicted. The binding affinities of the most potent compounds in the two series, (EZ)-17 alpha-[2-[(2-aminoethoxy)imino]ethyl]-5 beta-androstane-3 beta,14 beta-diol
Selective delivery of 2-hydroxy APA to Trypanosoma brucei using the melamine motif
作者:Nina Klee、Pui Ee Wong、Beatriz Baragaña、Farah El Mazouni、Margaret A. Phillips、Michael P. Barrett、Ian H. Gilbert
DOI:10.1016/j.bmcl.2010.06.070
日期:2010.8
Trypanosoma brucei, the parasite that causes human African trypanosomiasis, is auxotrophic for purines and has specialist nucleoside transporters to import these metabolites. In particular, the P2 aminopurine transporter can also selectively accumulate melamine derivatives. In this Letter, we report the coupling of the melamine moiety to 2-hydroxy APA, a potent ornithine decarboxylase inhibitor, with the aim of selectively delivering this compound to the parasite. The best compound described here shows an increased in vitro trypanocidal activity compared with the parent. (C) 2010 Elsevier Ltd. All rights reserved.